Things To Know About Disinfectants Testing and Its Different Tests
                     Things To Know About 
Disinfectants Testing and Its 
Different Tests
Introduction
 Disinfectants mainly used in hospitals, laboratories and Research 
Centres that must be tested for safety purposes. Their quality 
must be passed all the required Standard, as certain disinfectants 
lose effectiveness on standing and addition of organic matter. 
While certain Methods help in choosing the right intensity of 
disinfectant for use others test the effectiveness of disinfectant 
already in use.
 If the disinfectant is efficient or not, some techniques compare 
the performance with that of phenol whereas other methods 
simply state. With their pros and cons, there are quite a few 
methods of Disinfectants Testing. All these tests can be 
distributed to one of the following antiseptic tests: carrier, 
suspension, capacity, practical, field, or in-use test.
Carrier Test
 These test is the oldest process. 
The test explained by Robert 
Koch was a carrier test. By 
submersion in a liquid culture of 
the test organism, the carrier 
such as a silk or catgut thread or 
a pen cylinder (a little stick) is 
contaminated. For a given 
exposure time, the carrier is then 
dried and is brought in contact 
with the antiseptic.
 Potentially active concentration-
time relationships of the 
disinfectant are obtained, by 
multiplying the number of test 
concentrations of the 
disinfectant and the contact 
times. i.e., Dilution test.
Restrication of The Carrier Tests are:
 A) The number of bacteria dried on a carrier is hard to regulate 
and
 B) the existence of the bacteria on the carrier during drying is not
 The AOAC Use-dilution test is carrier-based. stainless steel 
cylinders are carefully cleaned, purify by autoclaving in a mixture 
of asparagine, cooled, and Inject with a test organism by 
engaging in one of the culture adjournment. For assessing the 
survival of the bacteria, the cylinders are exhausted on filter 
paper, dried at 37ºC for 40 minutes, subjected to the use-dilution 
of the antiseptic for almost 10 minutes, and cultured.
Suspension Test
 It is validated by subgroup whether this inoculum is killed or not, 
a test of the bacterial culture is prohibited into the antiseptic 
solution and after coverage.
 These tests are chosen to carrier tests as the bacteria are 
regularly subjected to the antiseptic. There are diverse types of 
suspension tests: the qualitative suspension, phenol coefficient, 
and the quantitative suspension tests.
 
 Conclusion: Creating documented evidence that a disinfection 
process will regularly remove or inactivate known or possible 
pathogens from inanimate objects” is defined as disinfection 
procedure validation.
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